Suppress warnings about deprecated Preferences in legacy Code

bundles/org.eclipse.equinox.preferences/META-INF/MANIFEST.MF

@@ -9,7 +9,7 @@ Bundle-Localization: plugin
 Require-Bundle: org.eclipse.equinox.common;bundle-version="[3.18.0,4.0.0)",
  org.eclipse.equinox.registry;bundle-version="[3.2.0,4.0.0)";resolution:=optional,
  org.osgi.service.prefs;bundle-version="[1.1.0,1.2.0)";visibility:=reexport
-Export-Package: org.eclipse.core.internal.preferences;x-friends:="org.eclipse.core.resources,org.eclipse.core.runtime,org.eclipse.equinox.p2.engine",
+Export-Package: org.eclipse.core.internal.preferences;x-friends:="org.eclipse.core.resources,org.eclipse.core.runtime,org.eclipse.equinox.p2.engine, org.eclipse.jdt.ls.filesystem",
  org.eclipse.core.internal.preferences.exchange;x-friends:="org.eclipse.core.runtime",
  org.eclipse.core.runtime.preferences;version="3.5.0"
 Bundle-ActivationPolicy: lazy; exclude:="org.eclipse.core.internal.preferences.exchange"

bundles/org.eclipse.equinox.preferences/src/org/eclipse/core/internal/preferences/PreferenceServiceRegistryHelper.java

@@ -28,6 +28,7 @@
  * has been separated into a separate class to ensure that the preferences will
  * be able to run without the registry being present.
  */
+@SuppressWarnings("deprecation") // ILegacyPreferences
 public class PreferenceServiceRegistryHelper implements IRegistryChangeListener {
 
 	private static final String ELEMENT_INITIALIZER = "initializer"; //$NON-NLS-1$

bundles/org.eclipse.equinox.preferences/src/org/eclipse/core/internal/preferences/PreferencesOSGiUtils.java

@@ -26,6 +26,7 @@
  *
  * @since org.eclipse.equinox.preferences 3.2
  */
+@SuppressWarnings("deprecation") // ILegacyPreferences
 public class PreferencesOSGiUtils {
 	private ServiceTracker<?, ILegacyPreferences> initTracker;
 	private ServiceTracker<?, DebugOptions> debugTracker;